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-rw-r--r--Documentation/CodingGuidelines16
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/CodingGuidelines b/Documentation/CodingGuidelines
index 3b042db624..f628c1f3b7 100644
--- a/Documentation/CodingGuidelines
+++ b/Documentation/CodingGuidelines
@@ -53,6 +53,18 @@ For shell scripts specifically (not exhaustive):
- We do not write the noiseword "function" in front of shell
functions.
+ - As to use of grep, stick to a subset of BRE (namely, no \{m,n\},
+ [::], [==], nor [..]) for portability.
+
+ - We do not use \{m,n\};
+
+ - We do not use -E;
+
+ - We do not use ? nor + (which are \{0,1\} and \{1,\}
+ respectively in BRE) but that goes without saying as these
+ are ERE elements not BRE (note that \? and \+ are not even part
+ of BRE -- making them accessible from BRE is a GNU extension).
+
For C programs:
- We use tabs to indent, and interpret tabs as taking up to
@@ -77,6 +89,8 @@ For C programs:
of "else if" statements, it can make sense to add braces to
single line blocks.
+ - We try to avoid assignments inside if().
+
- Try to make your code understandable. You may put comments
in, but comments invariably tend to stale out when the code
they were describing changes. Often splitting a function
@@ -91,7 +105,7 @@ For C programs:
- Use the API. No, really. We have a strbuf (variable length
string), several arrays with the ALLOC_GROW() macro, a
- path_list for sorted string lists, a hash map (mapping struct
+ string_list for sorted string lists, a hash map (mapping struct
objects) named "struct decorate", amongst other things.
- When you come up with an API, document it.